Question
P5.ST.JC.18121204-A1
The average cost of some books is $40.
When a book that costs $130 is removed,
the average cost of the books becomes $30.
How many books are there in the end?
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Primary 5 STRATEGIES P5.ST.JC.18121204

05 May 2024, 04:18 PM

The average cost of some books is $40.
When a book that costs $130 is removed,
the average cost of the books becomes $30.
How many books are there in the end?
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